Bunn TU3QF-EZ Instruction and safety manual

BUNN-O-MATIC CORPORATION
POST OFFICE BOX 3227
SPRINGFIELD, ILLINOIS 62708-3227
PHONE: [phone] FAX: [phone]
www.bunnomatic.com
TU3QF-EZ
OPERATING & SERVICE MANUAL
33030.0000F 8/01 © 2000 Bunn-O-Matic Corporation
BUNN
®
DISCONTINUED VERSION
The information in this manual
is no longer current.

Page 2
CONTENTS
User Notices ............................................................. 3
E ectrica Requirements ............................................ 4
P umbing Requirements ........................................... 4
Initia Set-Up ............................................................. 5
Operating Contro s.................................................... 5
C eaning .................................................................... 6
Tea Brewing .............................................................. 6
Adjustments and Optiona Settings ........................... 7
Troub eshooting ........................................................ 8
Service.................................................................... 15
Wiring Schematics.................................................. 26
INTRODUCTION
This equipment wi brew a four-ga on batch of fresh tea into an awaiting dispenser. The tea wi be dispensed at
approximate y room temperature to conserve ice. The brewer a so has a hot water faucet for a ied beverage use. The
brewer is on y for indoor use on a sturdy counter or she f.
W RR NTY
Bunn-O-Matic Corp. (“Bunn”) warrants the equipment manufactured by it to be commercia y free from defects
in materia and workmanship existing at the time of manufacture and appearing within one year from the date of
insta ation. In addition:
1.) Bunn warrants e ectronic circuit and/or contro boards to be commercia y free from defects in materia and
workmanship for three years from the date of insta ation.
2.) Bunn warrants the compressor on refrigeration equipment to be commercia y free from defects in materia
and workmanship for two years from the date of insta ation.
3.) Bunn warrants that the grinding burrs on coffee grinding equipment wi grind coffee to meet origina factory
screen sieve ana ysis for three years from date of insta ation or for 30,000 pounds of coffee, whichever comes first.
This warranty does not app y to any equipment, component or part that was not manufactured by Bunn or that,
in Bunn’s judgement, has been affected by misuse, neg ect, a teration, improper insta ation or operation, improper
maintenance or repair, damage or casua ty.
THE FOREGOING W RR NTY IS EXCLUSIVE ND IS IN LIEU OF NY OTHER W RR NTY, WRITTEN OR
OR L, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, NY IMPLIED W RR NTY OF EITHER
MERCH NT BILITY OR FITNESS FOR P RTICUL R PURPOSE. The agents, dea ers or emp oyees of Bunn are
not authorized to make modifications to this warranty or to make additiona warranties that are binding on Bunn.
According y, statements by such individua s, whether ora or written, do not constitute warranties and shou d not
be re ied upon.
The Buyer sha give Bunn prompt notice of any c aim to be made under this warranty by te ephone at (217)
529-6601 or by writing to Post Office Box 3227, Springfie d, I inois, 62708-3227. If requested by Bunn, the Buyer
sha ship the defective equipment prepaid to an authorized Bunn service ocation. If Bunn determines, in its so e
discretion, that the equipment does not conform to the warranty, Bunn sha repair the equipment with no charge
for parts during the warranty period and no charge for abor by a Bunn Authorized Service Representative during
the warranty period. If Bunn determines that repair is not feasib e, Bunn sha , at its so e option, rep ace the
equipment or refund the purchase price for the equipment.
THE BUYER’S REMEDY G INST BUNN FOR THE BRE CH OF NY OBLIG TION RISING OUT OF THE S LE
OF THIS EQUIPMENT, WHETHER DERIVED FROM W RR NTY OR OTHERWISE, SH LL BE LIMITED, S
SPECIFIED HEREIN, TO REP IR OR, T BUNN’S SOLE OPTION, REPL CEMENT OR REFUND.
In no event sha Bunn be iab e for any other damage or oss, inc uding, but not imited to, ost profits, ost sa es,
oss of use of equipment, c aims of Buyer’s customers, cost of capita , cost of down time, cost of substitute
equipment, faci ities or services, or any other specia , incidenta or consequentia damages.
33030 082901

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#00831.0000
#00656.0000
#03408.0000
#03409.0000
USER NOTICES
Carefu y read and fo ow a notices on the equipment and in this manua . They were written for your protec-
tion. A notices on the equipment shou d be kept in good condition. Rep ace any unreadab e or damaged abe s.
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Page 4
ELECTRIC L REQUIREMENTS
C UTION - The brewer must be disconnected from the power source unti specified in Initia Set-Up.
120V mode brewer requires 2-wire, grounded service rated 120 vo ts ac, 15 amp, sing e phase, 60 Hz.
Proceed as fo ows:
Electrical Hook-Up
C UTION – Improper e ectrica insta ation wi damage e ectronic components.
1. An e ectrician must provide e ectrica service as specified.
2. Using a vo tmeter, check the vo tage at the e ectrica source.
3. Connect the brewer to the power source.
4. If p umbing is to be hooked up ater be sure the brewer is disconnected from the power source. If p umbing
has been hooked up, the brewer is ready for Initia Set-Up .
PLUMBING REQUIREMENTS
The brewer must be connected to a co d water system with operating pressure between 20 and 90 psi (138
and 620 kPa) from a 1⁄2" or arger supp y ine. A shut-off va ve shou d be insta ed in the ine before the brewer.
Insta a regu ator in the ine when pressure is greater than 90 psi(620 kPa) to reduce it to 50 psi(345 kPa). The
water in et fitting is 1⁄4" f are.
NOTE - Bunn-O-Matic recommends 1⁄4" copper tubing for insta ations of ess than 25 feet and 3⁄8" for more than
25 feet from the 1⁄2" water supp y ine. A tight coi of copper tubing in the water ine wi faci itate moving the
brewer to c ean the countertop. Bunn-O-Matic does not recommend the use of a sadd e va ve to insta the
brewer. The size and shape of the ho e made in the supp y ine by this type of device may restrict water f ow.
This equipment must be installed to comply with the Basic Plumbing Code of the
Building Officials and Code dministrators International, Inc. (BOC )
and the Food Service Sanitation Manual of the Food and Drug dministration (FD ).
P2183
33030 052600
1. Remove the shipping cap from the bu khead fitting on the rear of the brewer.
2. Attach the f are fitting from the short piece of tubing on the strainer/f ow contro (supp ied) to the water in et
fitting at the rear of the brewer.
3. F ush the water ine and secure y attach it to the f are fitting on the strainer/f ow contro .
4. Turn on the water supp y.

Page 5
INITI L SET-UP
C UTION - The brewer must be disconnected from the power source throughout the Initia Set-up , except when
specified in the instructions.
1. Insert an empty funne into the funne rai s.
2. P ace an empty container of at east 4 ga ons capacity under the funne .
3. Connect the brewer to the power source.
4. P ace the "ON/OFF" switch in the "ON" position. Tank wi start to fi automatica y.
5. Water wi f ow into the tank and dispense for approximate y eighteen minutes, then cyc e wi stop.
6. Heater circuit wi activate automatica y.
7. Wait approximate y fifty minutes for the water in the tank to heat to the proper temperature. The ready ight
wi be activated when the brewer reaches the proper temperature.
8. Press the START switch to begin a brew cyc e. Once water comes out of the sprayhead, p ace the "ON/OFF"
switch in the "OFF" position. This wi dispense the expansion water in the tank.
9. Empty contents of the container through the faucet.
10. P ace the "ON/OFF" switch in the "ON" position then momentari y press and re ease the "START" switch.
11. A ow the cyc e to finish and measure the amount of water in the container. It shou d be 512 ounces ±2. Refer
to the adjustments section of this manua shou d the vo ume need to be increased or decreased.
The brewer is now ready for use in accordance with the Tea Brewing instructions.
OPER TING CONTROLS
A. ON/OFF Switch
ON - P acing the switch in the "ON" position a ows the start switch to activate a timed brew cyc e for four ga ons
of tea.
OFF - P acing the switch in the "OFF" position stops the brew cyc e. Stopping a brew cyc e after it has been started
wi not stop the f ow of water into the funne unti the tank syphons down to its proper eve . The switch should
always be placed in this position after a brew cycle and whenever the brewer is unattended.
B. Start Switch
Starts a brew cyc e when the ON/OFF switch is in the "ON" position.
C. Ready Indicator
This indicator g ows when prese ected brew water temperature has been achieved. It is a so used for diagnostic
testing of brewer.
D. Sanitize Switch
Starts a sanitize cyc e when pressed and re eased. This functions when the ON/OFF switch is in the "ON" position.
E. Green Tea/Black Tea Faucet Switch
Dispenses hot water for either green tea or b ack tea.
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Page 6
CLE NING
C UTION - CLEAN AND SANITIZE YOUR ICED TEA BREWER D ILY
1. Remove and thorough y c ean the entire brew funne . The funne tip and screen must be free from any tea
partic es or residue. Reassemb e the funne .
2. P ace the ON/OFF switch in the "OFF" position. Remove and thorough y rinse the sprayhead. The ho es must
be open and c ear of any minera deposits. Wipe the sprayhead pane c ean with a damp c oth.
3. Insert the de iming spring into the sprayhead fitting unti no more than two inches is visib e and move it in
and out 5 or 6 times. Insert the spring into the air vent ho e in the sprayhead pane and move it in and out 5
or 6 times. Reattach the sprayhead.
4. Wash the entire outside surface of the brewer with a c ean damp c oth.
5. P ace the empty 4 ga on tea reservoir on the base. Insert funne into rai s. Make sure faucet is c osed and id
cover is removed.
6. P ace the ON/OFF switch to the "ON" position. Press and re ease the "Sanitize" Switch.
7. After sanitize cyc e ends, et reservoir soak, then empty contents. Let reservoir air dry.
C UTION - DO NOT KEEP BREWED ICED TEA OVERNIGHT. THE SERVER MUST BE CLEANED DAILY.
TE BREWING
1. Begin each brew cyc e with a c ean empty brew funne and server. (Be sure the server id doesn’t interfere
with the f ow of di ution water.)
2. P ace the packet of fresh tea eaves into the funne .
3. Leve the bed of tea eaves by gent y shaking.
4. S ide the funne into the funne rai s unti it stops.
5. P ace the ON/OFF switch in the "ON" position.
6. Momentari y press the start switch.
C UTION - The funne contains hot iquids. Remove funne s ow y.
7. Carefu y remove the brew funne and discard the used packet when tea no onger drips from the funne tip.
8. P ace the ON/OFF switch in the "OFF" position to prevent a fa se start.
9. Fresh tea is avai ab e at the faucet on the dispenser.
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TU3QF-EZ DJUSTMENTS & OPTION L SETTINGS
P1864
33030 082901
P2174
DJUSTING BREW VOLUMES
IMPORT NT - Tank must be fu and refi so enoid shut off prior to making these adjustments.
Sprayhead must be insta ed whi e making these adjustments.
INCRE SING THE BREW VOLUME: Use the fo owing steps when you want to increase the amount of water for
each brew cyc e.
1. P ace a funne in the funne rai s and an empty container of at east four ga ons beneath the funne .
2. Turn ON the brewer.
3. Press and ho d the brew start switch unti you hear the brew so enoid c ick on-and-off three times (approxi-
mate y 5 seconds). Re ease the switch.
4. Momentari y press and re ease the brew start switch once for each two seconds to be added to the prior
setting.
5. A ow the cyc e to finish.
The brewer is now set to dispense this amount of water for each subsequent brew cyc e.
DECRE SING THE BREW VOLUME: Use the fo owing steps when you want to decrease the amount of water for
each brew cyc e.
1. P ace a funne in the funne rai s and an empty container of at east 4 ga ons beneath the funne .
2. Turn ON the brewer.
3. Momentari y press and re ease the brew start switch once for each two second period to be removed from
the prior setting.
4. Press and ho d the brew start switch unti you hear the brew so enoid c ick on-and-off three times (approxi-
mate y 5 seconds). Re ease the switch.
5. A ow the cyc e to finish.
The brewer is now set to dispense this amount of water for each subsequent brew cyc e.

Page 8
TROUBLESHOOTING
A troub eshooting guide is provided to suggest probab e causes and remedies for the most ike y prob ems
encountered. If the prob em remains after exhausting the troub eshooting steps, contact the Bunn-O-Matic
Technica Service Department.
• Inspection, testing, and repair of e ectrica equipment shou d be performed on y by qua ified service person-
ne .
• A e ectronic components have 120 vo t ac and ow vo tage dc potentia on their termina s. Shorting of
termina s or the app ication of externa vo tages may resu t in board fai ure.
• Intermittent operation of e ectronic circuit boards is un ike y. Board fai ure wi norma y be permanent. If an
intermittent condition is encountered, the cause wi ike y be a switch contact or a oose connection at a
termina or crimp.
• So enoid remova requires interrupting the water supp y to the va ve. Damage may resu t if so enoids are
energized for more than ten minutes without a supp y of water.
• The use of two wrenches is recommended whenever p umbing fittings are tightened or oosened. This wi
he p to avoid twists and kinks in the tubing.
• Make certain that a p umbing connections are sea ed and e ectrica connections tight and iso ated.
• This brewer is heated at a times. Keep away from combustib es.
W RNING – • Exercise extreme caution when servicing e ectrica equipment.
• Unp ug the brewer when servicing, except when e ectrica tests are specified.
• Fo ow recommended service procedures.
• Rep ace a protective shie ds or safety notices.
Before troubleshooting this brewer, check for the following:
Before servicing the brewer, make sure that vo tage is present at contro board. Check for vo tage across pins
1 & 7 of the eight pin J1 connector (b ack and white wires). If vo tage is present, proceed with testing. If
vo tage is not present, check wiring and vo tage at socket. Correct the prob em and retest before proceeding
with testing.
33030 082901
BREW VOLUME SETUP: Use the fo owing steps when the setting is unknown or a different circuit board is being
insta ed.
1. P ace a funne in the funne rai s and an empty container of at east four ga ons beneath the funne .
2. Turn ON the brewer.
3. Press and ho d the brew start switch unti you hear the brew so enoid c ick on-and-off three times (approxi-
mate y 5 seconds). Re ease the switch.
4. A ow the cyc e to continue unti the desired amount of water is dispensed and then turn OFF the brewer.
The brewer is now set to dispense this amount of water for each subsequent brew cyc e.
S NITIZE VOLUME: Use the above procedure substituting the sanitize switch for the brew start switch. The
vo ume for the sanitize function is set for 3 ga ons.
DJUSTING BREW VOLUMES (CONT.)

Page 9
TROUBLESHOOTING (cont.)
PROBLEM PROB BLE C USE REMEDY
BREWING CIRCUIT
Brew or sanitize cyc e wi not start 1. Ready ight f ashing
2. No water
3. No power or incorrect vo tage to
the brewer
4. ON/OFF switch not in the "ON" po-
sition
5. START Switch
6. Low water temperature (Brew
ockout is enab ed)
7. Brew so enoid va ve
8. Contro board
Brewer has shut down due to
ma function (See Diagnostic Chart
in manua , page 14, or under top
id of brewer).
Water ines and va ves to the brewer
must be open.
Check for vo tage across the b ack
and white termina s at the power
source.
The indicator amp must be it
Refer to Service - Start Switch for
testing procedures. See page 23
A ow brewer to heat unti ready
amp is it, or disab e the brew ock-
out feature. See page 7
Refer to Service - Brew So enoid
Va ve for testing procedures. See
page 16
Refer to Service - Contro Board for
testing procedures. See page 25
33030 052600

Page 10
TROUBLESHOOTING (cont.)
PROBLEM PROB BLE C USE REMEDY
BREWING CIRCUIT (cont.)
Set up brewer according to instruc-
tions in section djustments -Brew
Volumes. (See page 7) Using a stop
watch or second hand, time the
ength of the brew cyc e. Record
this time inside the top id. If ser-
vice is ever needed again, use the
time as reference to determine if
time has changed.
Inspect the sprayhead tube and
sprayhead for excessive ime de-
posits. De ime as required.
Refer to Service - Brew So enoid
Va ve for testing procedures. See
page 16
A) Direction of f ow arrow must be
pointing towards brewer.
B) Remove f ow contro and check
for obstructions. C ear or rep ace.
1. Brew vo ume
2. Lime bui d up
3. Brew So enoid Va ve
4. F ow Contro
Consistent y ow beverage eve in
the dispenser or beverage over-
f ows dispenser
33030 052600

Page 11
TROUBLESHOOTING (cont.)
PROBLEM PROB BLE C USE REMEDY
BREWING CIRCUIT (cont.)
Dripping from sprayhead
Weak beverage
Drip out time too ong
1. Lime bui d up
2. Brew So enoid Va ve
1. Sprayhead
2. Water temperature
3. Funne oading
1. Funne Tip
Inspect the tank assemb y for ex-
cessive ime deposits. De ime as re-
quired.
Refer to Service - Brew So enoid
Va ve for testing procedures. See
page 16
A five-ho e stain ess stee spray-
head must be used for proper ex-
traction.
P ace an empty brew funne on an
empty vesse of at east 4 ga ons
beneath the sprayhead. Initiate
brew cyc e and check the water
temperature immediate y be ow the
sprayhead with a thermometer. The
reading must not be ess than 5°F
be ow set temperature. Adjust the
temperature setting to increase the
water temperature. Refer to Initia
Set-up instructions.
The packet must be centered in the
funne and the bed of tea eaves ev-
e ed by shaking gent y.
The brew funne shou d be c eaned
thorough y before each brew cyc e
to essen the chance of tea eaf par-
tic es c ogging the funne tip.
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Page 12
TROUBLESHOOTING (cont.)
PROBLEM PROB BLE C USE REMEDY
Water does not heat to proper
temperature
IMPORTANT: Make sure no tem-
perature tests are taken before the
ready ight is "ON". Tank tempera-
ture must be stabi ized before read-
ings are taken.
1. Ready ight f ashing
2. Water not touching temperature
probe
3. Temperature Probe
4. Limit Thermostat
5. Tank Heater
Brewer has shut down due to
ma function (See Diagnostic Chart
in manua , page 14, or under top
id).
Remove probe and grommet. Look
into ho e on tank id. Water must
be within one inch from top of tank.
Remove the probe from the grom-
met and submerge in a water bath
of approximate y 70°F. Connect an
ohmmeter to pins 2 and 3 of the J5
connector. At 60°F the reading
shou d be 15.3k ± 2k OHMS, at
70°F the reading shou d be 11.8k ±
2k OHMS, and at 80°F the reading
shou d be 9.3k ± 2k OHMS. If the
probe is within these parameters,
reconnect the J5 p ug to the con-
tro board.
Refer to Service - Limit Thermostat
for testing procedures. See page 20
Refer to Service - Tank Heater for
testing procedures. See page 24
HE TING CIRCUIT (cont.)
33030 052600

Page 13
TROUBLESHOOTING (cont.)
PROBLEM PROB BLE C USE REMEDY
Spitting or excessive steaming
Brewer is making unusua noises
1. Lime bui d up on temperature
probe, tank or tank heater
2. Temperature Probe
3. Contro Board
1. P umbing ines
2. Water supp y
3. Lime bui d up
Inspect probe and tank assemb y
for excessive ime deposits. De ime
as required.
Remove the probe from the grom-
met and submerge in a water bath
of approximate y 70°F. Connect an
ohmmeter to pins 2 and 3 of the J5
connector. At 60°F the reading
shou d be 15.3k ± 2k OHMS, at
70°F the reading shou d be 11.8k ±
2k OHMS, and at 80°F the reading
shou d be 9.3k ± 2k OHMS. If the
probe is within these parameters,
reconnect the J5 p ug to the con-
tro board.
Set the temperature to 205°F. Let
tank temperature stabi ize. If tem-
perature in tank is above tempera-
ture setting by more than 7°F, re-
p ace the contro board. See page
25
P umbing ines shou d not rest on
the counter top.
The brewer must be connected to
a co d water supp y.
Remove the tank id and c ean in-
side of tank with a de iming agent,
if necessary.
HE TING CIRCUIT (cont.)
33030 052600

Page 14
DI GNOSTICS
Intermittent f ashing of the READY indicator indicates that a fau t exists. Count the number of f ashes between
pauses and use this chart as a guide to investigating the fau t.
FL SHES C USE THINGS TO CHECK
1 Reserved for future use.
2 Low Tank Leve Fau t - Water pressure
Leve probe dry too ong after fi va ve is energized Leve probe wiring
Temperature probe wiring
Fi va ve wiring, function, & strainer
3 Low Water Temperature Fau t - Tank heater , imit thermostat, temperature
Excessive heating time. probe wiring
4 Reserved for future use.
5 Temp Sensor Out-of-Range - High Sensor not connected to circuit board
6 Temp Sensor Out-of-Range - Low Sensor wires shorted together or to chassis
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Page 15
SERVICE
This section provides procedures for testing and
rep acing various major components used in this
brewer shou d service become necessary. Refer to
Troub eshooting for assistance in determining the
cause of any prob em.
W RNING - Inspection, testing, and repair of e ectri-
ca equipment shou d be performed on y by qua ified
service personne . The brewer shou d be disconnected
from the power source when servicing, except when
e ectrica tests are required and the test procedure spe-
cifica y states to p ug in the brewer.
COMPONENT CCESS
W RNING - Disconnect the brewer from the power
source before the remova of any pane or the rep ace-
ment of any component.
A components are accessib e by the remova of
the top cover and rear access pane .
The top cover is attached with one #4-40 screw.
Remova of the top cover wi a ow access to on/off
switch, start switch, faucet switch, sanitize switch, hot
water so enoid va ve, co d water so enoid va ve, con-
tro board, imit thermostat tank heater,
The rear access pane is attached with six #8-32
screws. Remova of the rear pane wi a ow access to
the brew so enoid va ve. FIG. 1 COMPONENT ACCESS
P2150.40
Contents
Brew So enoid Va ve ............................................ 16
Co d Water So enoid Va ve (for faucet) ................ 17
Faucet Switch ...................................................... 18
Hot Water So enoid Va ve (for faucet).................. 19
Limit Thermostat ................................................. 20
ON/OFF Switch..................................................... 21
Sanitize Switch .................................................... 22
START Switch ...................................................... 23
Tank Heater .......................................................... 24
Contro Board ...................................................... 25
Wiring Diagrams.................................................. 26
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Page 16
SERVICE (cont.)
BREW SOLENOID V LVE
FIG. 2 BREW SOLENOID VALVE
Location:
The brew so enoid va ve is mounted on the eft side
in the bottom rear of the brewer.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Disconnect the white and white/green wires from
the so enoid va ve. With the ON/OFF switch in the
"ON" upper position press the start switch.
3. With a vo tmeter, check the vo tage across the
white and white/green wires. Connect the brewer
to the power source. The indication must be 120
vo ts ac.
4. Disconnect the brewer from the power source,
If vo tage is present as described, proceed to #5
If vo tage is not present as described, refer to Wiring
Diagram and check brewer wiring harness.
5. Check for continuity across the so enoid va ve coi
termina s.
If continuity is present as described, reconnect the
white and white/green wires to the so enoid va ve.
If continuity is not present as described, rep ace the
so enoid va ve.
6. Check the so enoid va ve for coi action. Connect
the brewer to the power source. With ON/OFF
switch in the "ON" upper position press start switch
and isten carefu y in the vicinity of the so enoid
va ve for a "c icking" sound as the coi magnet
attracts.
7. Disconnect the brewer from the power source.
If the sound is heard as described and water wi not
pass through the so enoid va ve, there may be a b ock-
age in the water ine before the so enoid va ve or, the
so enoid va ve may require inspection for wear, and
remova of waterborne partic es.
If the sound is not heard as described, rep ace the
so enoid va ve.
Remova and Rep acement:
1. Remove a wires from so enoid va ve.
2. Turn off the water supp y to the brewer.
3. Disconnect the water ines to and from the so e-
noid va ve.
4. Remove the two hex-head screws ho ding the
mounting bracket to the brewer base.
5. Secure y insta the new so enoid va ve.
6. Attach the mounting bracket to the brewer base.
7. Secure y fasten the water ines to and from the
so enoid va ve.
8. Refer to Fig.3 when reconnecting the wires.
FIG.3 SOLENOID VALVE TERMINALS
P2153.40
33030 052600
WHI to Power Cord
WHI/GRN to Contro
Board J1-4
P2158.40

Page 17
SERVICE (cont.)
COLD W TER SOLENOID V LVE (for faucet)
33030 052600
WHI to Power Cord
WHI/BLU to
Contro Board J1-3
FIG. 5 COLD WATER VALVE TERMINALS
P2154.45
FIG. 4 COLD WATER SOLENOID VALVE
Location:
The co d water so enoid va ve for the faucet is o-
cated inside the hood. It is ocated in front of the
tank, on the right side.
Test Procedures:
NOTE: Remove the white/vio et wire from the hot wa-
ter so enoid va ve before testing the co d water va ve.
1. Disconnect the brewer from the power source.
2. Disconnect the white and white/b ue wires from
the so enoid va ve. Ho d the faucet switch in the
Green Tea position.
3. With a vo tmeter, check the vo tage across the
white and white/b ue wires. Connect the brewer
to the power source. The indication must be 120
vo ts ac.
4. Disconnect the brewer from the power source.
If vo tage is present as described, proceed to #5.
If vo tage is not present as described, refer to Wiring
Diagram and check brewer wiring harness.
5. Check for continuity across the so enoid va ve coi
termina s.
If continuity is present as described, reconnect the
white and white/b ue wires to the so enoid va ve.
If continuity is not present as described, rep ace the
so enoid va ve.
6. Check the so enoid va ve for coi action. Connect
the brewer to the power source. When pressing
the faucet switch in the Green Tea position isten
carefu y in the vicinity of the so enoid va ve for a
"c icking" sound as the coi magnet attracts.
7. Disconnect the brewer from the power source.
If the sound is heard as described and water wi not
pass through the so enoid va ve, there may be a b ock-
age in the water ine before the so enoid va ve or, the
so enoid va ve may require inspection for wear, and
remova of waterborne partic es.
If the sound is not heard as described, rep ace the
so enoid va ve.
Remova and Rep acement
1. Remove a wires from so enoid va ve.
2. Turn off the water supp y to the brewer.
3. Disconnect the water ines to and from the so e-
noid va ve.
4. Remove the two #8-32 nuts ho ding the mount-
ing bracket to the brewer.
5. Lift out the bracket.
6. Remove the two #8-32 screws ho ding the so e-
noid va ve to the mounting bracket.
7. Secure y insta the new so enoid va ve to the
mounting bracket.
8. Attach the mounting bracket to the brewer.
9. Secure y fasten the water ines to and from the
so enoid va ves.
10. Refer to Fig. 5 when reconnecting the wires.
11. Refer to Fig. 9 when reconnecting white/vio et wire
to the hot water so enoid va ve.
P2158.40

Page 18
SERVICE (cont.)
F UCET SWITCH
P2150.40
33030 052600
FIG. 6 FAUCET SWITCH
P2155
ORA to Contro
Board J3-1 VIO to Contro
Board J3-2
YEL to Contro
Board J3-3
FIG. 7 FAUCET SWITCH TERMINALS
Location:
The faucet switch is ocated in the front of the
hood, above and to the eft of the brew funne , and to
the right of the faucet.
Test Procedures:
1. Disconnect the brewer from the power source.
2. Removes the wires from the termina s.
3. Check for continuity across the vio et and orange
termina s. Press switch for "Green Tea". Continu-
ity shou d be present.
4. Check for continuity across the vio et and ye ow
termina s. Press switch for "B ack Tea". Continuity
shou d be present. No continuity shou d be
present across any termina s when switch is in
center position.
If continuity is present as described, the switch is
operating proper y.
If continuity is not present as described, rep ace the
switch.
Remova and Rep acement:
1. Remove the wires from the switch termina s.
2. Compress the c ips inside the hood and gent y
push the switch through the opening.
3. Push the new switch into the opening and spread
the c ips to ho d the switch captive in the hood.
4. Refer to Fig. 7 when reconnecting the wires.

Page 19
SERVICE (cont.)
HOT W TER SOLENOID V LVE (for faucet)
33030 030101
WHI/VIO to Re ay
WHI to Power Cord
P2156.50
FIG. 9 HOT WATER VALVE TERMINALS
FIG. 8 HOT WATER SOLENOID VALVE
Location:
The hot water so enoid va ve for the faucet is o-
cated inside the hood. It is ocated in front of the
tank, on the eft side.
Test Procedures:
NOTE: Remove the white/b ue wire from the co d wa-
ter so enoid va ve before testing the hot water va ve.
1. Disconnect the brewer from the power source.
2. Check the water eve in the tank to confirm that it
is within 1/2" from the top of the tank.
3. Connect the brewer to the power source.
4. Check the dispense va ve for coi action. P ace the
ON/OFF switch in the "ON" position, press and ho d
the faucet switch in the B ack Tea position. Listen
carefu y in the vicinity of the hot water dispense
va ve for a "c icking" sound as the coi magnet
attracts and repe s the p unger.
5. Disconnect the brewer from the power source.
If the sound is heard as described, there may be a
b ockage in the dispense va ve or the water ine to the
sprayhead. Remove the dispense va ve and inspect for
wear, and remove waterborne partic es.
If the sound is not heard as described, proceed to #6.
P2158.40
6. Connect the vo tmeter ead ends to the hot water
dispense va ve coi termina s. Connect the brewer
to the power source. P ace "ON/OFF" Switch in the
"ON" position. Press and ho d the B ack Tea faucet
switch. The indication must be 120 vo ts ac .
7. Disconnect the brewer from the power source.
If vo tage is present as described, but no coi action is
observed, nor "c icking" heard, dispense va ve is de-
fective. Rep ace va ve and test again to verify repair.
If vo tage is not present as described, refer to Wiring
Diagrams and check the brewer wiring harness. A so
check the contro board for proper operation. See
Page 25.
Remova and Rep acement
1. Remove a wires from so enoid va ve.
2. Turn off the water supp y to the brewer.
3. Disconnect the water ines to and from the so e-
noid va ve.
4. Remove the two #8-32 nuts ho ding the so enoid
va ve to the hood.
5. Secure y insta the new so enoid va ve to the hood.
6. Secure y fasten the water ines to and from the
so enoid va ves.
7. Refer to Fig. 9 when reconnecting the wires.
8. Refer to Fig. 5 when reconnecting the white/b ue
wire to the co d water va ve.

Page 20
SERVICE (cont.)
LIMIT THERMOST T
FIG. 10 LIMIT THERMOSTAT
Location:
The imit thermostat is ocated inside the hood on
the tank id.
Test Procedure:
1. Disconnect the brewer from the power source.
2. With a vo tmeter, check the vo tage across the b ue
wire on the imit thermostat and the white wire on
the tank heater termina . Connect the brewer to
the power source. The indication must be 120
vo ts ac.
3. Disconnect the brewer from the power source.
If vo tage is present as described, proceed to #4.
If vo tage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.
4. Remove the b ack wire from the imit thermostat.
5. Check the vo tage across the exposed termina of
the imit thermostat and the white wire on the tank
heater with a vo tmeter. Connect the brewer to the
power source. The indication must be 120 vo ts
ac.
6. Disconnect the brewer from the power source.
If vo tage is present as described, reconnect the b ack
wire to the imit thermostat. The imit thermostat is
operating proper y.
If vo tage is not present as described, rep ace the imit
thermostat.
Remova and Rep acement
1. Remove both wires from the imit thermostat ter-
mina s.
2. Remove the two #8-32 nuts attaching the imit ther-
mostat to the tank.
3. Insta the new imit thermostat and secure into
p ace with the two #8-32 nuts.
4. Refer to Fig. 11 when reconnecting the wires.
BLU to Contro
Board RL-1
BLK to Tank Heater
FIG. 11 LIMIT THERMOSTAT TERMINALS
P1776.50
33030 052600
P2159.40